Protection devices.

Protection devices.
Fuses with fuse element series PN, PR designed for services, pension and that of electrical circuits from the effects of short-circuit currents and prolonged overload. Safety structures differ, no-minalnoyu voltage, rated current fuses and fusible inserts them.
Safety fuses PP57U series designed to protect electrical circuits from short circuits in semiconductor converters and other
com-plektnyh devices that include power semiconductor devices The principle of fuse melting consists in the insertion of copper, zinc or a special alloy with current flow through it more than nominal.
Installation of fuses must be performed in accordance with the Overall-adjusting drawings and current "Rules of construction elektroustano-wok".
Terms fuse in space - fair is also provision under plane-Noah consolidation. Connecting external conductors to fuse at currents from 31.5 to 400 and carry copper kabelyumy or tires.
Circuit breakers protect electrical networks from ne-revantazhen and short circuit current through the off-load its provisions, for operational management areas of electrical networks, as well as for starting, stopping three-phase induction motors In the presence of trip; they are: Slip-ring electromagnetic-we combined, electromagnetic trip; zero in the wire, Low-voltage release, remote trip;, micro-processor and without a trip; trip;.
Circuit breakers series VA51, AE20, A3700, AP-50 and other appointed cheni for vmykan electrical shutdowns and manually provide automated-Atlantic off electrical current in case of overload and short circuit. Thermal trip; protects the electrical installation of long-acting overload currents. Trip; protects circle using bimetallic plate, which bends when heated its struc-IOM, exceeding permissible. In some automatic switches for on-talent overload applied semiconductor trip;. Electromagnetic trip; protects electrical currents from short-circuit anyone. Trip; triggered when the flow on the coils short-circuit and affects the latch moving core. In addition to the mentioned types of trip; apply trip; independent action, mini-malnoyi voltage and other. Circuit breakers are supplied lattice extinguish the arc, and the mechanism that speeds up the locking and unlocking contacts.
Microprocessor trip; used in switch-VA-88-43, ensures the accuracy and reliability of the possibility of live-Adjust yuvannya in service that enables fully integrated into the logic, which is operated and which is used in control systems enerhozabez-guarantee of.
Mutual coherence characteristics elektroteplovoyi and electromagnet-term trip; systems can include these devices in complex sys-tem of distribution and protection of electrical networks. Switches have the characteristics of class B, C, D.
The principle of: With overload in terms of the defending current flowing, heats the bimetallic plate. When heated plate bends and affects the lever free trip;. When a short circuit in a circle, which is protected, current flows through the coil at the electromagnet-automated tactical switch, greatly increases, thus increasing the magnetic field that moves the core, which affects the lever free trip;. In both cases, the moving contact away from the real, automatic switch off and there is a gap circle. Thus electric stabbing pro-schayetsya overload and short circuit.
Installation performed on 35 mm mounting DIN - rail switches for series VA47-100 .... Operating position switch (series VA16) in space at vertyka lniy-plane: vertical labeled "1", up horizontally - the inscription "1" to the right or left. Allowed deviation from the working position to 10  in any way.